Simon Schaffer is a historian of science at the University of Cambridge, England. In this podcast, he discusses the search for absolute zero and its impact on science and technology.Podcast produced by David Levin. Interview by David Dugan. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers.To learn more about the race to conquer cold, visit our Web site at pbs.org/nova/zero